DT9817-R datasheet(6/10 Pages) ETC

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DT9816 Design Advantages

T/H

A/D Ch 0

A/D Ch 1

A/D Ch 2

A/D Ch 3

A/D Ch 4

A/D Ch 5

16-Bit

A/D

16-Bit

A/D

16-Bit

A/D

16-Bit

A/D

16-Bit

A/D

16-Bit

A/D

Ext Trig

Data Stream

Ext Clk

CLK

Analog

Input

Sampled

Data

T/H

t AD

t AJ

Hold

Track

Hold

t AD = Aperture Delay of 35 ns

t AJ = Aperture Jitter (Uncertainty) of 1 ns

The time between each channel (Aperture Delay Matching)

is 5 ns maximum.

The DT9816 modules feature six, independent, successive-

approximation A/D converters with track-and-hold

circuitry. Each converter uses a common clock and trigger

for simultaneous sampling of all six analog input signals.

The throughput rate varies depending on the model you

choose.

The A/D design of the DT9816 modules feature built-in

accuracy. A maximum aperture delay of 35 ns (the time

that it takes the A/D to switch from track to hold mode)

is well matched at 5 ns across all six track-and-hold

circuits, virtually eliminating the channel-to-channel skew

that is associated with multiplexed inputs. A maximum

aperture uncertainty of 1 ns (the jitter or variance in

aperture delay), virtually eliminates phase noise in your

data.

Six Simultaneously Sampled Analog Inputs

Accurate Measurements Designed In

This graph shows the outstanding quality of the

DT9816-A for all error sources – effective number of bits

greater than 13.1 from all sources. Note the absence of

harmonic content and digital switching noise across the

full spectrum.

Key Features of the DT9816

• High-Speed Simultaneous Acquisition — Acquire

all six analog input channels simultaneously at

up to 50 kS/s per channel (DT9816), 150 kS/s

per channel (DT9816-A), or 750 kS/s per channel

(DT9816-S).

• Input -3 dB bandwidth is 4 MHz typical

(DT9816, DT9816-A), 40 MHz typical (DT9816-S)

• High-Resolution Data — 16-bit resolution for

precision measurements.

• Two Bipolar Input Ranges — Input range of ±10

V and ±5 V signal for maximum flexibility.

• Digital I/O Functions — 8 digital inputs and

8 digital outputs for controlling external

equipment.

• Multifunction Counter/Timer — One 16-bit

counter/timer for event counting, frequency

measurement, and continuous pulse output

operations.

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